Related Manuals for Baltimore Aircoil Company VFL Series
Summary of Contents for Baltimore Aircoil Company VFL Series
- Page 1 MVFLv19EN VFL Closed Circuit Cooling Towers OPERATING AND MAINTENANCE INSTRUCTIONS...
- Page 2 Recommended maintenance and monitoring programme Baltimore Aircoil Company equipment needs to be properly installed, operated and maintained. Documentation of the equipment used, including a drawing, technical data sheet and this manual should be kept on record. To achieve long, trouble-free and safe operation, it is necessary to establish an operating plan including a programme of regular inspection, monitoring and maintenance.
- Page 3 Inspections and monitoring Start-Up Weekly Monthly Quarterly Every 6 Annually Shutdown months System overview Record keeping as per event Lubrication Start-Up Weekly Monthly Quarterly Every 6 Annually Shutdown months Fan shaft bearings Motor bearings* Adjustable motor base * only for motors with grease fittings with typical frame size > 200L (>30 KW) Cleaning procedures Start-Up Weekly...
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Page 4: Table Of Contents
Table of contents OPERATING AND MAINTENANCE INSTRUCTIONS Construction Details General information Operating conditions Connecting pipework Safety precautions Disposal requirements Non-walking surfaces Modifications by others Warranty Water Care About water care Biological control Chemical treatment Passivation Overflow connection Cold Weather Operations About cold weather operation Protection against sump water freezing Capacity control... -
Page 5: Construction Details
CONSTRUCTION DETAILS 1. Casing 2. Water distribution section 3. High efficiency drift eliminators 4. Forward curved centrifugal fan 5. Fan shaft and bearing 6. Fan motor 10. Coil 11. Pump 12. Man size access door 1 Construction Details 1 Construction Details W W W . -
Page 6: General Information
GENERAL INFORMATION Operating conditions BAC cooling equipment is designed for the operating conditions specified below, which must not be exceeded during operation. • Wind Load: For safe operation of unshielded equipment exposed to wind speeds above 120 km/h installed at a height above 30 m from the ground, contact your local BAC-Balticare representative. - Page 7 PURGE REQUIREMENTS The installer of BAC closed circuit cooling towers must ensure a proper air purging of the system prior to operation. Entrained air can restrict the capacity of the cooler, resulting in higher process temperatures. All connections (installed by others) must be leak free and tested accordingly. CIRCULATING WATER QUALITY The standard heat exchanger coils are made of black steel and are galvanized on the outside only.
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Page 8: Connecting Pipework
Connecting pipework All piping external to BAC cooling equipment must be supported separately. In case the equipment is installed on vibration rails or springs, the piping must contain compensators to eliminate vibrations carried through the external pipework. The equipment outlet piping must be installed under the operating level of the equipment to prevent air suction and pump cavitation. -
Page 9: Disposal Requirements
ELECTRICAL SAFETY All electrical components associated with this equipment should be installed with a lockable disconnect switch located within sight of the equipment. In the event of multiple components, these can be installed after a single disconnect switch but multiple switches or a combination thereof are also allowed. -
Page 10: Warranty
Warranty BAC will guarantee all products to be free from manufactured defects in materials and workmanship for a period of 24 months from the date of shipment. In the event of any such defect, BAC will repair or provide a replacement. For more details, please refer to the Limitation of Warranties applicable to and in effect at the time of the sale/purchase of these products. -
Page 11: Water Care
WATER CARE About water care In all cooling equipment, operating in evaporative mode, the cooling is accomplished by evaporating a small portion of the re-circulating water as it flows through the equipment. When this water evaporates, the impurities originally present in the water remain. Unless a small amount of water is drained from the system, known as blow down, the concentration of dissolved solids will increase rapidly and lead to scale formation or corrosion or both. - Page 12 ® Baltibond Hybrid Coating and SST304L 6.5 to 9.2 pH during initial passivation Below 8.2 (for units with HDG coil only) Total hardness (as CaCO 50 to 750 mg/l Total alkalinity (as CaCO 600 mg/l max. Total dissolved solids 2050 mg/l max. Conductivity 3300 µS/cm Chlorides...
- Page 13 SST304L SST316L SST316L with HDG coil (with SST316L coil) 6.5 to 9.2 6.5 to 9.5 pH during initial passivation Below 8.2 Not applicable (for units with HDG coil only) Total hardness (as CaCO 50 to 750 mg/l 50 to 750 mg/l Total alkalinity (as CaCO 600 mg/l max.
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Page 14: Biological Control
Biological control The growth of algae, slimes and other micro-organisms, if uncontrolled, will reduce system efficiency and may contribute to the growth of potentially harmful micro-organisms, such as Legionella, in the recirculating water system. Accordingly a treatment programme specifically designed to address biological control should be initiated when the system is first filled with water and administered on a regular base thereafter in accordance with any regulations (national, regional) that may exist or in accordance with accepted codes of good practice, such as EUROVENT 9-5/6, VDMA Detailsheet 24649 etc. -
Page 15: Overflow Connection
® Full stainless steel units and units protected by the Baltibond hybrid coating do not require passivation. An exception to this are units with a galvanized steel coil bundle which do still require the proper passivation procedure as described here in this section. In case you can't keep the pH below 8.2, a secondary approach is to conduct a chemical passivation using inorganic phosphate or film-forming passivation agents. -
Page 16: Cold Weather Operations
COLD WEATHER OPERATIONS About cold weather operation BAC cooling equipment can be operated in sub freezing ambient conditions provided the proper measures are taken. Listed below are general guidelines which should be followed to minimize the possibility of coil freeze-up. As these guidelines may not include all aspects of the anticipated operation scheme, system designer and operator must thoroughly review the system, location of the equipment, controls and accessories to ensure reliable operation at all times. -
Page 17: Protection Against Coil Freezing
The desired method to match the cooling capacity to load and weather conditions is to adjust the air flow by the use of modulating controls (variable speed drives). Alternatively, multi speed fan motors or fan cycling can be applied, but fans operating on a common heat exchange section should always be operated simultaneously. - Page 18 % Ethylene Freeze protection -10°C -16°C -25°C -39°C Freeze protection of ethylene glycol solutions Glycol systems require specific inhibitors compatible with the materials of construction they come into contact with. These inhibitors generally come pre-mixed with the glycol additive for the cooling circuit. If the system must be operated with water, the following conditions must be met simultaneously: 1.
- Page 19 Appr. minimum heat load (kW) Minimum flow Model (l/s) Unit with Std. Unit positive closure damper hood VFL 241-H 10,6 VFL 242-H 12,7 VFL 242-J 12,7 VFL 243-J 14,4 VFL 361-L 16,0 VFL 361-M 16,0 VFL 362-M 19,1 10,4 VFL 363-K 21,6 11,0 VFL 363-M...
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Page 20: Maintenance Procedure
MAINTENANCE PROCEDURE Checks and adjustments COLD WATER BASIN AND BASIN STRAINERS The cold water basin should be inspected regularly. Any debris which may have accumulated in the basin or on the strainers should be removed. Quarterly, or more often if necessary, the entire cold water basin should be drained, cleaned and flushed with fresh water to remove the silt and sediment which normally collects in the basin during operation. - Page 21 Fixation and wrapping of float ball Operating height is the water level above sump bottom during operation. Operating water level 1. Operating height 2. Overflow 3. Pan bottom Operating heights for the evaporative cooling equipment are indicated in the tables below: Model Operating height (measured from pan bottom)
- Page 22 Water make-up valve assembly 1. Float ball 2. Float arm assembly 3. Float valve CAUTION Supply pressure for mechanical make-up valves should be between 1 and 3,5 bar. To make the initial basin water level setting, fill the sump with water until 2 cm above operating level. Adjust the wing nuts of the float ball so, that the make-up valve is completely closed.
- Page 23 CAUTION Sump heaters can be hot. BELT TENSIONING Belt tensioning can be adjusted by changing the position of the fan motor(s) by rotating the motor base adjustment screw, which extends through the bottom frame angle. Check belt tension as follows: 1.
- Page 24 Deflection force (kg) Diameter (mm) Belt profile motor sheave Min. Max. 80 through 125 135 through 200 >200 100 through 125 132 through 212 >212 Belt tension forces New belts have to be re-tensioned after 24 hours operation. If belt tensioning is required, please proceed as follows: 1.
- Page 25 2. Loosen the set screw. 3. Using a drift pin centre-punch, tap the collar (in the hole provided) tangentially in the direction of rotation while holding the shaft. 4. Re-tighten the screw. 5. Close unit access door and start pump(s) and fan(s). Locking collar assembly 1.
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Page 26: Inspections And Corrective Actions
MOTOR VOLTAGE AND CURRENT Check the voltage and the current of all three legs of the fan and pump motors. The current should not exceed the nameplate rating. After prolonged shut-down (or motor is stored with unit in kit form) the motor insulation should be checked with a Megger insulation tester prior to restarting. - Page 27 2. Remove the eliminators and access doors. 3. Inspect the coil for obstructions damages corrosion fouling 4. After inspection, install eliminators and access doors and start pump(s) and fan(s). Remove any obstructions from heat transfer section(s). Any damages or corroded areas need to be repaired. Call your local BAC Balticare representative for assistance. Minor fouling can usually be removed chemically or by temporary changes to the water treatment programme.
- Page 28 4. Clean eliminators from debris and foreign matter. Remove dirt and obstructions. Replace damaged or ineffective eliminators. 5. Install eliminators and ensure they fit tightly with no gaps. CAUTION Do not step on eliminators. WATER DISTRIBUTION The inspection procedure is as follows: 1.
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Page 29: Lubrication
SPRAY WATER PUMP The BAC pump contains a mechanical seal between pump housing and pump motor. This seal needs to be checked quarterly for proper operation and replaced if necessary. ELECTRIC WATER LEVEL CONTROL PACKAGE (OPTIONAL) The electric water level control package (optional) maintains a constant water level in the cold water sump independent of cooling load changes and water supply pressure variations. -
Page 30: Cleaning Procedures
MOTOR BEARINGS Motors with frame size >200L (>30kW) have grease fittings grease intervals: twice a year unless otherwise shown on the nameplate of the motor grease products: see below The bearings should be lubricated only with a hand grease gun. Do not use high pressure grease guns, since they may rupture the bearing seals. - Page 31 3. Clean debris from exterior and fan(s) with soft brush, if necessary use water and soap. 4. Clean interior with (soap) water and soft brush, if necessary use high pressure water jet. 5. Remove any debris from water distribution system and clean any nozzles if clogged. If necessary nozzle and grommet may be removed for cleaning.
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Page 32: Comprehensive Maintenance
COMPREHENSIVE MAINTENANCE About comprehensive maintenance In order to ensure maximum efficiency and minimum downtime of your evaporative cooling system, it is recommended to establish and execute a programme of preventive maintenance. Your local BAC Balticare representative will assist you in establishing and implementing such programme. The preventive maintenance programme must not only avoid that excessive downtime occurs under unforeseen and unwanted conditions, it also ensures that factory authorized replacement parts are used, which are designed to fit and for their purpose carry the full factory warranty. -
Page 33: Further Assistance & Information
FURTHER ASSISTANCE & INFORMATION Assistance BAC has established a specialized total care company called Balticare. The BAC Balticare offering involves all elements required to ensure a safe and efficient operation of your evaporative cooling products. For more details, contact your local BAC representative for further information and specific assistance at www.BaltimoreAircoil.eu More information REFERENCE LITERATURE... - Page 34 W W W . B A L T I M O R E A I R C O I L . E U...
- Page 35 W W W . B A L T I M O R E A I R C O I L . E U...
- Page 36 W W W . B A L T I M O R E A I R C O I L . E U...
- Page 37 W W W . B A L T I M O R E A I R C O I L . E U...
- Page 38 COOLING TOWERS CLOSED CIRCUIT COOLING TOWERS ICE THERMAL STORAGE EVAPORATIVE CONDENSERS HYBRID PRODUCTS PARTS, EQUIPMENTS & SERVICES www.BaltimoreAircoil.eu info@BaltimoreAircoil.eu Please refer to our website for local contact details. Industriepark - Zone A, B-2220 Heist-op-den-Berg, Belgium © Baltimore Aircoil International nv...
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mounting base height and type